The "Titan Arum", or "corpse flower" is reported to be a close
contender for "stinkiest plant". Fortunately, it only blooms every
several years.
http://tlc.howstuffworks.com/home/5-foul-smelling-flowers-from-around-the-world.htm

the world stinkiest plant is the "rafflesid arnldii" and the
"titan arum" and guess what else they are also two of the worlds
biggest plants and have the same nickname the "corpse plant"and
they both live in the "tropical rainforest" they really have a lot
in comnon! serprising hu